Display Filter And Display Device Having The Same

Abstract

A display filter functions not only to block unnecessary radiation emitted from a display device but also to allow Infrared (NIR) radiation emitted from the display device to be used as a user interface signal. The display filter includes a near-infrared radiation blocking layer which absorbs near-infrared radiation emitted from the display device. The near-infrared radiation blocking layer contains 1.5% by weight of a di-immonium-based colorant that absorbs the near-infrared radiation.

1 . A display filter used in a display device which can determine a touch position by detecting infrared radiation emitted from the display device, the display filter comprising:
 a near-infrared radiation blocking layer which absorbs near-infrared radiation emitted from the display device,   wherein the near-infrared radiation blocking layer contains 1.5% by weight of a di-immonium-based colorant that absorbs the near-infrared radiation.   
     
     
         2 . The display filter according to  claim 1 , wherein the near-infrared radiation blocking layer allows the near-infrared radiation emitted from the display device to have a transmittance of 30% or more in a wavelength range of 850 nm and a transmittance of 5% or less in a wavelength range of 950 nm or more. 
     
     
         3 . The display filter according to  claim 1 , wherein the near-infrared radiation blocking layer comprises a polymer resin film that contains a near-infrared radiation absorbing colorant. 
     
     
         4 . The display filter according to  claim 1 , wherein the near-infrared radiation blocking layer comprises a coating layer which is formed on a surface of a transparent support. 
     
     
         5 . The display filter according to  claim 1 , further comprising a conductive mesh film which absorbs electromagnetic radiation emitted from the display device,
 wherein the near-infrared radiation blocking layer is an adhesive layer adhered to the conductive mesh film.   
     
     
         6 . The display filter according to  claim 1 , wherein the near-infrared radiation blocking layer further contains at least one of a color-compensation colorant and a neon-cut colorant. 
     
     
         7 . A display filter used in a display device which can determine a touch position by detecting infrared radiation emitted from the display device, the display filter comprising:
 a near-infrared radiation blocking layer which absorbs near-infrared radiation emitted from the display device,   wherein the near-infrared radiation blocking layer allows the near-infrared radiation emitted from the display device to have a transmittance of 30% or more at a wavelength range around 850 nm and a transmittance of 5% or less in a wavelength range of 950 nm or more.   
     
     
         8 . The display filter according to  claim 7 , wherein the near-infrared radiation blocking layer comprises a polymer resin film that contains a near-infrared radiation absorbing colorant. 
     
     
         9 . The display filter according to  claim 7 , wherein the near-infrared radiation blocking layer comprises a coating layer which is formed on a surface of a transparent support. 
     
     
         10 . The display filter according to  claim 7 , further comprising a conductive mesh film which absorbs electromagnetic radiation emitted from the display device,
 wherein the near-infrared radiation blocking layer is an adhesive layer adhered to the conductive mesh film.   
     
     
         11 . The display filter according to  claim 7 , wherein the near-infrared radiation blocking layer further contains at least one of a color-compensation colorant and a neon-cut colorant. 
     
     
         12 . A display device which can determine a touch position by detecting infrared radiation emitted from the display device, the display device comprising a display filter,
 wherein the display filter comprises a near-infrared radiation blocking layer which absorbs near-infrared radiation emitted from the display device,   the near-infrared radiation blocking layer containing 1.5% by weight of a di-immonium-based colorant that absorbs near-infrared radiation.   
     
     
         13 . The display device according to  claim 12 , wherein the display device is one selected from the group consisting of a plasma display panel, a liquid crystal display, and an organic light emitting display. 
     
     
         14 . The display device according to  claim 12 , wherein the near-infrared radiation blocking layer allows the near-infrared radiation emitted from the display device to have a transmittance of 30% or more in a wavelength range of 850 nm and a transmittance of 5% or less in a wavelength range of 950 nm or more. 
     
     
         15 . The display device according to  claim 14 , wherein the display device is one selected from the group consisting of a plasma display panel, a liquid crystal display, and an organic light emitting display. 
     
     
         16 . A display device which can determine a touch position by detecting infrared radiation emitted from the display device, the display device comprising a display filter,
 wherein the display filter comprises a near-infrared radiation blocking layer which absorbs near-infrared radiation emitted from the display device,   the near-infrared radiation blocking layer allowing the near-infrared radiation emitted from the display device to have a transmittance of 30% or more at a wavelength range around 850 nm and a transmittance of 5% or less in a wavelength range of 950 nm or more.   
     
     
         17 . The display device according to  claim 16 , wherein the display device is one selected from the group consisting of a plasma display panel, a liquid crystal display, and an organic light emitting display.